But... I am considering changing a few of the fish that are in my 55. My fish are all very lively and seem to be happy, but I am beginning to question whether or not its really fair to have them in my tank. I didn't think that either of my tinfoil barbs would grow nearly as rapidly as they have (they've gone from 2" to 5" in 2 months) and I feel kinda bad for my catfish as well. Both of my catfish just kinda sit around all day, but that's partially because I've got lights on my tank for my live plants. I know I need to find a new home for the tinfoils for sure, but I think I'm going to find a home for both of my catfish as well. (If you're in the so-cal area and are interested, let me know... I don't want them to go to a lfs with little aquariums if I can avoid it) I do care about my fish, and that's why its taken so much thought to even actually consider letting them go. With them gone, my tank will feel kinda bare with my 3 clown loaches, 2 opaline gouramis, and african brown knife in there. What would you guys suggest I get to take their spots? (prefferably something that won't get quite as big) I'm thinking about getting a synodontis eupterus, but I'd like to avoid getting a bunch of bottom dwellers too. My clown loaches are bottom/mid most of the time, and my brown knife has his own hiding spot. What would be some good mid-upper level fish which wouldn't beat up my gouramis? I've considered the possibility of adding another 2-3 female opalines, and would be happy with that, I just have to track a few down. (the store I work at is out of them at the moment) Are tiger barbs likely to pick on my gouramis? I'm absolutely not giving up my brown knife or clown loaches (I know I'm being stubborn about it, but I'm way too attached to them) but am willing to consider finding a home for the gouramis as well if we can identify a good mid-top dweller that would do well in my tank, but wouldn't do so well with the gouramis. Thank you everyone for your ideas. 
